The closest things I know of in our day to campmeetings of 50 years ago are among the groups that still maintain the old-line 'holiness' standards of dress, hair, no make-up, etc. Since my wife wears light make-up, pants, and trims her hair, those folks generally don't view us as sanctified, and probably not even as saved. But if you're interested in fellowshipping with folks who think they're basically the only ones going to heaven, I do know they are still around if you really want to find them. I cannot in good conscience recommend or promote such groups, however.